Class 12 Chemistry Chapter 1: Solutions -
Handwritten-style Notes (Printable)
1. Solution: A homogeneous mixture of two or more substances.
2. Components: Solute (less amount), Solvent (more amount).
3. Types: Solid in liquid, liquid in liquid, gas in liquid, etc.
4. Concentration: Mass %, Volume %, ppm, Mole fraction, Molarity, Molality.
5. Solubility: Maximum amount of solute dissolved at a given temperature.
6. Henry's Law: Solubility of gas increases with pressure.
7. Raoult's Law: Vapour pressure is proportional to mole fraction.
8. Ideal Solution: Obeys Raoult's law; ∆Hmix=0, ∆Vmix=0.
9. Non-Ideal Solution: Shows positive or negative deviation.
10. Colligative Properties: Relative lowering of vapour pressure, elevation in boiling point,
depression in freezing point, osmotic pressure.
11. Abnormal Molar Mass: Explained using van't Hoff factor (i).
Important Tips: Learn all formulae, SI units and numerical methods. Practice NCERT examples
and back exercises.
